Abstract
We consider the exclusive flavor changing neutral current processes B → M ν over(ν, ̄) ( M = π, K, ρ, K* ) in the leptophobic Z′ model, in which the charged leptons do not couple to the extra Z′ boson. We find that these exclusive modes are very effective to constrain the leptophobic Z′ model. In the leptophobic Z′ model, additional right-handed neutrinos are introduced and they can contribute to the missing energy signal in B → M + E/ decays. Through the explicit calculations, we obtain quite stringent bounds on the model parameters, | Us b Z′ | {less-than or slanted equal to} 0.29 and | Ud bZ′ | {less-than or slanted equal to} 0.61, from the already existing experimental data. We also briefly discuss an interesting subject of massive right-handed neutrinos, which might be connected with the dark matter problem.
| Original language | English |
|---|---|
| Pages (from-to) | 270-277 |
| Number of pages | 8 |
| Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
| Volume | 636 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2006 May 18 |
Bibliographical note
Funding Information:We thank Y.G. Kim and U. Haisch for careful reading and useful comments. The work of J.H.J. was supported in part by Brain Korea 21 Program and in part by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) No. R02-2003-000-10050-0. The work of C.S.K. was supported in part by CHEP-SRC Program and in part by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) No. KRF-2005-070-C00030 and in part by JSPS Fellowship. The work of J.L. was supported in part by Brain Korea 21 Program and in part by Grant No. F01-2004-000-10292-0 of KOSEF-NSFC International Collaborative Research Grant. The work of C.Y. was supported by the Korea Research Foundation Grant funded by Korea Government (MOEHRD, Basic Research Promotion FUND) (KRF-2005-075-C00008).
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics